The Upper Tisa Valley. Preparatory proposal for Ramsay

Figure 3. The Tur/Túr catchment, flood embankments, reservoir, key gauges
The Tur/Túr emerges in the Gutâi Mountains at an elevation of 989 m. The
tributaries along the upper section, the Valea Rea, Valea Albă, Lechincioara, and
Târşolţ drain to the Oaş Basin (Figure 3.).
Downstream of Călineşti Oaş the river sope becomes flatter, the mountain
character changing successively to that of a lowland stream. The left hand tributaries
Talna and Racta, further the right hand tributary Turţ enter in the lowlands already.
The mountain parts of the catchment have relatively abundant precipitation and
owing to the favourable runoff conditions the unit runoff is high, over 20 l/s km 2 .
The flood and runoff control system in the Tur/Túr catchment consists of the
following components:
− The flood embankments along the flood plains the section of the Tur/Túr
between Călineşti Oaş and the national boundary, further the donwstream
sections of the Turţ, the Talna Mare and the Egher creeks.
− The Călineşti Oaş reservoir, which serves also flood control purposes upper of
the flood defences.
− The drainage canals built to remove the surface runoff from the areas behind the
flood defences.
− The runoff lift stations.
Prompted by the losses caused by the floods in May, 1970 in the Romanian part
of the Tur/Túr catchment, the Călineşti Oaş reservoir was built in 1972, which serves
besides flood control, the purposes of fish farming and power generation. Following
the first trial impoundment in June, 1974, the reservoir was commissioned definitely in
1979.
The creeks carrying abundant water drain a 375 km 2 large part of the catchment
(30% of the total) to the reservoir. The 798 m long, 9.5 m high gravity dam was built
of local rock Of the total 23.09 million m 3 reservoir space 20.34 million m 3 serve flood
control purposes. At the normal retention level the surface area of the 4.7 km long and
1.2 km wide reservoir is 382 ha. Under emergency conditions the bottom outlet, the
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